Final outcome: binocular distance vision without glasses. Results based on an analysis of 575 consecutive procedures. 20/40 (6/12) means that the patient has to stand at 20 feet to see letters that a “normal” person could see at 40 feet – the UK minimum driving standard. 20/16 (6/5) means that the patient can read letters at 20 feet that a “normal” person would have to stand at 16 feet to see (better than normal vision).